Year	% gross
1971	16.0318508148193
1972	15.8635196685791
1973	16.8539600372314
1974	17.4801692962646
1975	19.6420307159424
1976	20.4446201324463
1977	21.2996597290039
1978	20.3933601379395
1979	21.0167999267578
1980	20.4611301422119
1981	20.7737197875977
1982	20.8168907165527
1983	22.1079692840576
1984	22.8085594177246
1985	24.6208095550537
1986	25.5263500213623
1987	26.6875705718994
1988	24.789119720459
1989	23.9437103271484
1990	24.4765300750732
1991	35.6041412353516
1992	34.2519493103027
1993	37.6699600219727
1994	39.6286506652832
1995	37.2607803344727
1996	41.2094802856445
1997	45.1309204101562
1998	46.210090637207
1999	47.509090423584
2000	51.8473587036133
2001	58.9337615966797
2002	66.089111328125
2003	71.9906463623047
2004	79.7857208251953
2005	89.7935180664062
2006	94.2239379882812
2007	89.7303695678711
2010	104.379302978516
2011	109.845771789551
2012	113.724617004395
2013	115.288063049316
2014	118.675216674805
2016	127.080291748047
2017	132.302368164062
2018	138.393676757812
2019	142.388107299805
2020	143.310684204102
2021	150.201766967773